Java Resources
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- Home
- Home
- 10 Steps To Plan Better So You Can Write Less Code
- 5 Steps to organizing a successful Campsite event
- Academic Honesty Policy
- accessibility 101
- Accessing the database from your frontend
- Adding Environment Variables
- Adding Snippets In Sublime Text
- Adding Snippets To Sublime Text
- Advantages and Disadvantages of Javascript
- Algorithm Arguments Optional
- Algorithm Binary Agents
- Algorithm Boo who
- Algorithm Caesars Cipher
- Algorithm Check for Palindromes
- Algorithm Chunky Monkey
- Algorithm Confirm the Ending
- Algorithm Convert HTML Entities
- Algorithm Diff Two Arrays
- Algorithm DNA Pairing
- Algorithm Drop It
- Algorithm Everything be True
- Algorithm Exact Change
- Algorithm Factorialize a Number
- Algorithm Falsy Bouncer
- Algorithm Find The Longest Word in a String
- Algorithm Finders Keepers
- Algorithm Friendly Date Ranges
- Algorithm Inventory Update
- Algorithm Make a Person
- Algorithm Map the Debris
- Algorithm Missing letters
- Algorithm Mutations
- Algorithm No Repeats Please
- Algorithm Pairwise
- Algorithm Pig Latin
- Algorithm Repeat a String Repeat a String
- Algorithm Return Largest Numbers in Arrays
- Algorithm Reverse a String
- Algorithm Roman Numeral Converter
- Algorithm Search and Replace
- Algorithm Seek and Destroy
- Algorithm Slasher Flick
- Algorithm Smallest Common Multiple
- Algorithm Sorted Union
- Algorithm Spinal Tap Case
- Algorithm Steamroller
- Algorithm Style Guide
- Algorithm Sum All Numbers in a Range
- Algorithm Sum All Odd Fibonacci Numbers
- Algorithm Sum All Primes
- Algorithm Symmetric Difference
- Algorithm Title Case a Sentence
- Algorithm Truncate a String
- Algorithm Validate US Telephone Numbers
- Algorithm Where art thou
- Algorithm Where do I belong
- Algorithms Merge Sort
- Angular Resources
- Arithmetic Operators
- Array.isArray
- August 2015 Improvements
- August Live Stream
- Back End Project Resources
- Backend file structure
- beta
- Bobby Tables
- Bonus SocketIO
- Bootstrap
- bot announce
- botdemo
- botintro
- Brownie Points
- Browser Storage
- Camper News
- camperbot
- Campsites
- Capitalize First Letter Of String
- chai
- chai assert
- chai cheat
- Challenge Access Array Data with Indexes
- Challenge Access Multi Dimensional Arrays With Indexes
- Challenge Accessing Nested Arrays In Json
- Challenge Accessing Nested Objects In Json
- Challenge Accessing Objects Properties With Bracket Notation
- Challenge Accessing Objects Properties With The Dot Operator
- Challenge Accessing Objects Properties With Variables
- Challenge Add a Negative Margin to an Element
- Challenge Add a Submit Button to a Form
- Challenge Add Alt Text to an Image for Accessibility
- Challenge Add Borders Around your Elements
- Challenge Add Different Margins to Each Side of an Element
- Challenge Add Different Padding to Each Side of an Element
- Challenge Add Elements within your Bootstrap Wells
- Challenge Add Font Awesome Icons to all of our Buttons
- Challenge Add Font Awesome Icons to our Buttons
- Challenge Add ID Attributes to Bootstrap Elements
- Challenge Add Images to your Website
- Challenge Add New Properties to a JavaScript Object
- Challenge Add Placeholder Text to a Text Field
- Challenge Add Rounded Corners with a Border Radius
- Challenge Add Two Numbers with JavaScript
- Challenge Add your JavaScript Slot Machine Slots
- Challenge Adding A Default Option In Switch Statements
- Challenge Adjust the Margin of an Element
- Challenge Adjusting the Padding of an Element
- Challenge Appending Variables to Strings
- Challenge Apply the Default Bootstrap Button Style
- Challenge Assignment With A Returned Value
- Challenge Assignment with Divided by Equals
- Challenge Assignment with Minus Equals
- Challenge Assignment with Plus Equals
- Challenge Assignment with Times Equals
- Challenge Bring your JavaScript Slot Machine to Life
- Challenge Build JavaScript Objects
- Challenge Call out Optional Actions with Button Info
- Challenge Center Text with Bootstrap
- Challenge Chaining If Else Statements
- Challenge Change Text Inside an Element Using jQuery
- Challenge Change Text with Click Events
- Challenge Change the Color of Text
- Challenge Change the CSS of an Element Using jQuery
- Challenge Change the Font Size of an Element
- Challenge Check Radio Buttons and Checkboxes by Default
- Challenge Check the Length Property of a String Variable
- Challenge Clone an Element Using jQuery
- Challenge Comment out HTML
- Challenge Comment your JavaScript Code
- Challenge Comparison With The Equality Operator
- Challenge Comparison With The Greater Than Equal To Operator
- Challenge Comparison With The Greater Than Operator
- Challenge Comparison With The Inequality Operator
- Challenge Comparison With The Less Than Equal To Operator
- Challenge Comparison With The Less Than Operator
- Challenge Comparison With The Strict Equality Operator
- Challenge Comparison With The Strict Inequality Operator
- Challenge Comparisons With The Logical And Operator
- Challenge Comparisons With The Logical Or Operator
- Challenge Concatenate Strings with .concat
- Challenge Concatenating Strings with Plus Operator
- Challenge Concatenating Strings with the Plus Equals Operator
- Challenge Condense arrays with reduce
- Challenge Construct JavaScript Objects with Functions
- Challenge Constructing Strings with Variables
- Challenge Convert JSON Data to HTML
- Challenge Count Backwards With a For Loop
- Challenge Create a Block Element Bootstrap Button
- Challenge Create a Bootstrap Button
- Challenge Create a Bootstrap Headline
- Challenge Create a Bootstrap Row
- Challenge Create a Bulleted Unordered List
- Challenge Create a Class to Target with jQuery Selectors
- Challenge Create a Custom Heading
- Challenge Create a Form Element
- Challenge Create a JavaScript Slot Machine
- Challenge Create a Set of Checkboxes
- Challenge Create a Set of Radio Buttons
- Challenge Create a Text Field
- Challenge Create an Ordered List
- Challenge Create Bootstrap Wells
- Challenge Create Decimal Numbers with JavaScript
- Challenge Declare JavaScript Objects as Variables
- Challenge Declare JavaScript Variables
- Challenge Declare String Variables
- Challenge Decrement a Number with Javascript
- Challenge Delete HTML Elements
- Challenge Delete Properties from a JavaScript Object
- Challenge Delete your jQuery Functions
- Challenge Disable an Element Using jQuery
- Challenge Ditch Custom CSS for Bootstrap
- Challenge Divide One Number by Another with JavaScript
- Challenge Escape Sequences in Strings
- Challenge Escaping Literal Quotes in Strings
- Challenge Fill in the Blank with Placeholder Text
- Challenge Filter Arrays with filter
- Challenge Find Numbers with Regular Expressions
- Challenge Find the Length of a String
- Challenge Find White Space with Regular Expressions
- Challenge Finding a Remainder in Javascript
- Challenge Generate Random Fractions with JavaScript
- Challenge Generate Random Whole Numbers with JavaScript
- Challenge Generate Random Whole Numbers within a Range
- Challenge Get Geo location Data
- Challenge Get JSON with the jQuery getJSON Method
- Challenge Give a Background Color to a Div Element
- Challenge Give Each Element a Unique ID
- Challenge Give your JavaScript Slot Machine some stylish images
- Challenge Global Scope And Functions
- Challenge Global Vs Local Scope In Functions
- Challenge Headline with the h2 Element
- Challenge House our page within a Bootstrap Container Fluid Div
- Challenge Import a Google Font
- Challenge Increment a Number with Javascript
- Challenge Inform with the Paragraph Element
- Challenge Inherit Styles from the Body Element
- Challenge Initializing Variables with the Equal Operator
- Challenge Introducing Else If Statements
- Challenge Introducing Else Statements
- Challenge Introducing Javascript Object Notation Json
- Challenge Invert Regular Expression Matches with JavaScript
- Challenge Iterate Odd Numbers With a For Loop
- Challenge Iterate over Arrays with map
- Challenge Iterate Through An Array With A For Loop
- Challenge Iterate with JavaScript For Loops
- Challenge Iterate with JavaScript While Loops
- Challenge Join Strings with .join
- Challenge Label Bootstrap Buttons
- Challenge Label Bootstrap Wells
- Challenge Learn how Script Tags and Document Ready Work
- Challenge Line up Form Elements Responsively with Bootstrap
- Challenge Link to External Pages with Anchor Elements
- Challenge Local Scope And Functions
- Challenge Make Circular Images with a Border Radius
- Challenge Make Dead Links using the Hash Symbol
- Challenge Make Images Mobile Responsive
- Challenge Make Instances of Objects with a Constructor Function
- Challenge Make Object Properties Private
- Challenge Make Unique Objects by Passing Parameters to our Constructor
- Challenge Manipulate Arrays With pop()
- Challenge Manipulate Arrays With push()
- Challenge Manipulate Arrays With shift()
- Challenge Manipulate Arrays With unshift()
- Challenge Manipulate JavaScript Objects
- Challenge Modify Array Data With Indexes
- Challenge Multiple Identical Options In Switch Statements
- Challenge Multiply Two Numbers with JavaScript
- Challenge Nest an Anchor Element within a Paragraph
- Challenge Nest Many Elements within a Single Div Element
- Challenge Nest one Array within Another Array
- Challenge Nesting For Loops
- Challenge Override All Other Styles by using Important
- Challenge Override Class Declarations by Styling ID Attributes
- Challenge Override Class Declarations with Inline Styles
- Challenge Override Styles in Subsequent CSS
- Challenge Passing Values To Functions With Arguments
- Challenge Perform Arithmetic Operations on Decimals with JavaScript
- Challenge Prefilter JSON
- Challenge Prioritize One Style Over Another
- Challenge Quoting Strings with Single Quotes
- Challenge Remove an Element Using jQuery
- Challenge Remove Classes from an element with jQuery
- Challenge Render Images from Data Sources
- Challenge Replacing If Else Chains With Switch
- Challenge Responsively Style Checkboxes
- Challenge Responsively Style Radio Buttons
- Challenge Return A Value From A Function With Return
- Challenge Return Early Pattern For Functions
- Challenge Returning Boolean Values From Functions
- Challenge Reverse Arrays with reverse
- Challenge Save your Code Revisions Forever with Git
- Challenge Say Hello to HTML Elements
- Challenge Selecting From Many Options With Switch Statements
- Challenge Set the Font Family of an Element
- Challenge Set the ID of an Element
- Challenge Sift through Text with Regular Expressions
- Challenge Size your Images
- Challenge Solution Template
- Challenge Sort Arrays with sort
- Challenge Specify How Fonts Should Degrade
- Challenge Split Strings with split
- Challenge Split your Bootstrap Row
- Challenge Store Multiple Values in one Variable using JavaScript Arrays
- Challenge Storing Values with the Equal Operator
- Challenge Style Multiple Elements with a CSS Class
- Challenge Style Text Inputs as Form Controls
- Challenge Style the HTML Body Element
- Challenge Subtract One Number from Another with JavaScript
- Challenge Target a Specific Child of an Element Using jQuery
- Challenge Target Elements by Class Using jQuery
- Challenge Target Elements by ID Using jQuery
- Challenge Target Even Numbered Elements Using jQuery
- Challenge Target HTML Elements with Selectors Using jQuery
- Challenge Target the Children of an Element Using jQuery
- Challenge Target the Parent of an Element Using jQuery
- Challenge Target the same element with multiple jQuery Selectors
- Challenge Taste the Bootstrap Button Color Rainbow
- Challenge Testing Objects For Properties
- Challenge Trigger Click Events with jQuery
- Challenge Turn an Image into a Link
- Challenge Uncomment HTML
- Challenge Understand Boolean Values
- Challenge Understand String Immutability
- Challenge Understanding Case Sensitivity in Variables
- Challenge Understanding Uninitialized Variables
- Challenge Updating Object Properties
- Challenge Use a CSS Class to Style an Element
- Challenge Use Abbreviated Hex Code
- Challenge Use an ID Attribute to Style an Element
- Challenge Use appendTo to Move Elements with jQuery
- Challenge Use Bracket Notation to Find the First Character in a String
- Challenge Use Bracket Notation to Find the Last Character in a String
- Challenge Use Bracket Notation to Find the Nth Character in a String
- Challenge Use Bracket Notation to Find the Nth to Last Character in a String
- Challenge Use Clockwise Notation to Specify the Margin of an Element
- Challenge Use Clockwise Notation to Specify the Padding of an Element
- Challenge Use Comments to Clarify Code
- Challenge Use Conditional Logic with If Else Statements
- Challenge Use CSS Selectors to Style Elements
- Challenge Use Hex Code for Specific Colors
- Challenge Use Hex Code for Specific Shades of Gray
- Challenge Use Hex Code to Color Elements Blue
- Challenge Use Hex Code to Color Elements Gray
- Challenge Use Hex Code to Color Elements Green
- Challenge Use Hex Code to Color Elements Red
- Challenge Use Hex Code to Color Elements White
- Challenge Use Hex Code to Mix Colors
- Challenge Use HTML5 to Require a Field
- Challenge Use jQuery to Modify the Entire Page
- Challenge Use Responsive Design with Bootstrap Fluid Containers
- Challenge Use RGB to Color Elements Blue
- Challenge Use RGB to Color Elements Gray
- Challenge Use RGB to Color Elements Green
- Challenge Use RGB to Color Elements Red
- Challenge Use RGB to Color Elements White
- Challenge Use RGB to Mix Colors
- Challenge Use RGB values to Color Elements
- Challenge Use Spans for Inline Elements
- Challenge Use the Bootstrap Grid to Put Elements Side By Side
- Challenge Use the Javascript Console
- Challenge Using Objects For Lookups
- Challenge Using typeof
- Challenge Warn your Users of a Dangerous Action
- Challenge Write Reusable JavaScript with Functions
- Check if an element is hidden using jQuery
- Check if element is hidden js or jquery
- Checkpoint Convert Celsius to Fahrenheit
- Checkpoint Counting Cards
- Checkpoint Golf Code
- Checkpoint Profile Lookup
- Checkpoint Record Collection
- Checkpoint Shopping List
- Checkpoint Stand In Line
- Checkpoint Word Blanks
- Clear Your Browser's Local Storage
- Clone A Specific Branch
- code case
- code formatting
- Code of Conduct
- Coding Help
- CONTRIBUTING
- Contributions Guide with Typo Demo
- Create, Upload and Link Animated GIF Image
- Creating a new API endpoint
- Creating a new directive
- Creating a New Github Issue
- Creating a new route
- css
- css selectors
- Currying
- dau
- debugging
- Debugging JavaScript with Browser DevTools
- Deleting A Branch
- demo trim
- Develop Back End Project locally and run on c9.io
- Disable Code Auto Run
- Django Start Project
- Dotnet
- Dynamic URLs using $routeParams
- Edit or Delete message
- Elixir
- emoji
- Epilogue
- equality vs identity
- example
- Fixing exports.update
- For loops Explained
- Free Code Camp Back End Development Certification
- Free Code Camp completion language requirements
- Free Code Camp Data Visualization Certification
- Free Code Camp Deployment Workflow
- Free Code Camp Front End Development Certification
- Free Code Camp Full Stack Development Certification
- Free Code Camp is an open source community distributed across many platforms
- Free Code Camp JavaScript Style Guide
- Free Code Camp logo
- Free Code Camp's Privacy Policy
- Front End Project Use the Twitchtv JSON API
- Frontend file structure
- Functional Programming Higher Order Functions
- Get info about the current user
- Get Screen Size In Pixels
- Get started with Node_js
- Getting a coding job
- Git Amend Last
- Git Blame
- Git Change the URL of a remote repository
- Git Checkout A Remote Branch
- Git Delete a Branch both locally and remotely
- Git Force Git to overwrite local files on pull
- git merge
- Git Pull Vs Git Fetch
- Git Push Local To Remote Repository
- git rebase
- Git Resources
- Git Shortcut
- Git Undo Redo A Commit
- Gitter
- Gitter Moderation Policy
- global variables
- Go
- Grunt
- Guide Online Contribution
- Guide to Back End Projects Table of Contents
- Guide to Submitting Posts to Free Code Camp Medium Publication
- Gulp Basics
- Help I've Found a Bug
- Help Rooms
- Heroku Deployment Guide
- Higher Order functions
- How Free Code Camp works
- How FreeCodeCamp Nonprofit Projects work
- How GitHub Issue Moderators AKA Issue Mods Work
- How JSONP is different from JSON
- How Long Free Code Camp Takes
- How to add Free Code Camp to my LinkedIn profile
- How to best use the Global Control Shortcuts for Mac
- How to clear specific values from your browser's local storage
- How to clone the FreeCodeCamp website on a Windows pc
- How To Contribute To The Wiki
- How to create a Campsite for your city
- How To Create A Pull Request for Free Code Camp
- How to deploy a website without writing any code at all
- How To Fork And Maintain a Local Instance of Free Code Camp
- How to Get Help on Gitter
- How to get help when you get stuck
- How to get the MEAN stack running locally on OSX
- How To Install Clementine
- How to install Screenhero
- How to know who is in charge of your Campsite on Facebook
- How To Log In To Your Local FCC Site
- how to post code
- How to Rename a Local Branch
- How to share your workspace selfie with FreeCodeCamp on instagram
- How to start when you are stuck (I)
- How to start when you are stuck (II)
- How to start when you are stuck (III)
- How to use the Free Code Camp Wiki
- How you can get to Inbox Zero with Gmail shortcuts
- How you can help to stimulate your city's Campsite on Facebook
- How you can reach the Free Code Camp team to interview them for your publication
- Html and CSS Cheat Sheet
- html elements
- If Free Code Camp is free, how does it make money
- Ignore Files Committed To Git Repo
- IIFE
- Install Django Flask
- Installing WordPress Locally on Mac
- Intro to Yeoman Angular Fullstack Back End Projects
- isLoggedInAsync
- Java
- Java Basics
- Java Introduction
- Java Loops
- Java Resources
- Javascript Callback Functions
- JavaScript Truth Table
- jQuery
- js arguments
- js Array prototype concat
- js Array prototype every
- js Array prototype filter
- js Array prototype forEach
- js Array prototype indexOf
- js Array prototype join
- js Array prototype lastIndexOf
- js Array prototype map
- js Array prototype pop
- js Array prototype push
- js Array prototype reduce
- js Array prototype reverse
- js Array prototype shift
- js Array prototype slice
- js Array prototype some
- js Array prototype sort
- js Array prototype splice
- js Array prototype toString
- js Boolean
- js closures
- JS Comparison Operators
- JS Current URL
- js falsy
- js for in loop
- js for loop
- js for of loop
- js functions
- JS Get Timestamp
- js Global Object
- js immutable
- js loops
- JS Regex Resources
- JS Resources
- js Scopes
- JS Strict Mode
- js String prototype charAt
- js String prototype charCodeAt
- js String prototype concat
- js String prototype indexOf
- js String prototype lastindexOf
- js String prototype match
- js String prototype replace
- js String prototype slice
- js String prototype split
- js String prototype substr
- js String prototype substring
- js String prototype toLowerCase
- js String prototype toUpperCase
- js ternary
- js truthy
- js undefined
- jsonp
- Know it all
- Known Issues With Codepen
- latex
- Learn the basics of the VIM editor
- Linking Your Account with GitHub
- Linux
- List of Free Code Camp city based Campsites
- Loop Protect
- Map
- materializecss framework as a bootstrap alternative
- Math.max
- Math.min
- Math.pow
- medium example wiki article
- More useful APIs
- Mostaganem
- Object.getOwnPropertyNames
- Object.keys
- October 2015 Improvements
- October 2015 Summit Agenda
- Official Free Code Camp Chat Rooms
- ooda
- Other resources that Free Code Camp recommends to nonprofits
- Page redirects using javascript
- Pair programming and why it is special
- parseInt
- Permutations
- Php
- Politica De Honestidad Academica
- Programming Fundamental
- Programming Methodology
- Promises
- Pseudoclassical class definition OOp
- Pull Request Contribute
- PULL_REQUEST_TEMPLATE
- Python
- Python Basics
- Python Functions
- Python Introduction
- Python More Builtin Types
- Python Operators
- Python Resources
- Quick tip keep data in sync
- README
- Reduce made easy
- Refresh Your Browser Cache
- Registering your Nonprofit to Raise Donations through Free Code Camp Commit
- Restrict a page to authenticated users
- RTFM
- Ruby
- Ruby Introduction
- Run Apache Server On A Mac
- Saturday Summit August 2015
- Saturday Summit December 2015
- Saturday Summit November 2015
- Saturday Summit October 2015
- Searching for Your Issue on Github
- Seed data
- Select Issues for Contributing Using Labels
- Setting Up A React ES6 Webpack Project
- Site Improvements August 2015
- Site Improvements October 2015
- Slack
- Spanish Translation Terminology
- staging
- Start Here
- Streaks
- Stream Your Coding Sessions on Twitch.tv
- String.fromCharCode
- String.length
- Swashbuckle Swagger Operation Alphabetical Order
- The main advantages of Free Code Camp
- The Return Early Pattern
- Tips on How To Become A Good Pair Programmer
- topic
- Translating Free Code Camp into Your Native Language
- Translations Guide
- Twitch
- up_and_running_with_sass
- update
- Updates February 11 2016
- using anonymous self executing functions for private namespacing in your js apps
- Using browsec for securing your connection to fcc
- Using Github Pages for your front end development projects
- video demo
- wat
- Web Development in Python
- Web Resources
- What exactly Free Code Camp does
- What pair programming is and why it is special
- What the main advantages of Free Code Camp are
- What the style guide for Algorithms is
- What to do if you speak a language that Free Code Camp does not yet support
- What you will learn, and in what sequence you will learn it
- Why does Free Code Camp use JavaScript instead of Ruby or Python
- Why you need Free Code Camp
- Why You Should Try Pair Programming
- wiki js template
- Wiki Style Guide
- World Language Chat Rooms
- Write and Run ES6 Code in Browser
- writing a markdown file using atom
- Writing great git commit message
- Show 601 more pages…
New to Free Code Camp?
JS Concepts
JS Language Reference
- arguments
- Array.prototype.filter
- Array.prototype.indexOf
- Array.prototype.map
- Array.prototype.pop
- Array.prototype.push
- Array.prototype.shift
- Array.prototype.slice
- Array.prototype.some
- Array.prototype.toString
- Boolean
- for loop
- for..in loop
- for..of loop
- String.prototype.split
- String.prototype.toLowerCase
- String.prototype.toUpperCase
- undefined
Other Links
Clone this wiki locally
Java Resources
Java is trademarked and licensed by Oracle. Most of the following are un-official resources, unless hosted by Oracle.
Tutorials
- Oracle Official Java Tutorials
- Thinking in Java
- Think Java
- Effective Java by Joshua Bloch
- Jenkov's Java Tutorials
- Mkyong's Java & Spring Tutorials
- Vogella's Java Tutorials
- Java 8 Tutorial
- Better Java
- Java Programming notes by NTU
- Princeton's Introduction to Programming in Java
- Introduction to Programming Using Java
- Java Practices
- Java Design Patterns
- Algorithms in Java
- Spring Official Guides
Challenges
- Java Koans
- Coding Bat Java Challenges
- Excercism Java Challenges
- Project Euler
- Practice It! - Java Challenges
Community
Learn to code and help nonprofits. Join our open source community in 15 seconds at http://freecodecamp.com
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